Estimation of Carbonation and Service Life of Box Culvert for Power Transmission Line
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초록
The construction of underground structures such as box culverts for electric power transmission is increasing more and more, and the life extension of these structures is very important. Carbonation-induced corrosion in concrete may often occur in a high carbon dioxide environment. In this study, the risk of carbonation of two concrete box culverts in an urban area was evaluated by measuring the carbonation rate and concrete cover depth. Then, the carbonation-free service life at the depth of the steel was calculated, based on in situ information, by the Monte Carlo simulation. The service life of box culvert due to carbonation was estimated over 250 years via Monte Carlo simulation.
Abstract
The construction of underground structures such as box culverts for electric power transmission is increasing more and more, and the life extension of these structures is very important. Carbonation-induced corrosion in concrete may often occur in a high carbon dioxide environment. In this study, the risk of carbonation of two concrete box culverts in an urban area was evaluated by measuring the carbonation rate and concrete cover depth. Then, the carbonation-free service life at the depth of the steel was calculated, based on in situ information, by the Monte Carlo simulation. The service life of box culvert due to carbonation was estimated over 250 years via Monte Carlo simulation.
참고문헌 (3)
- "ACI Committee 222, “Corrosion of metals in concrete”, Manual of concrete practice, part 3, Detroit(USA)", American Concrete Institute, ~ (1994)
- Arnon B, "Steel corrosion in concrete", pp.120~35 (1997), E&FN SPON
- Klemm WA, "Accelerated curing of cementitious systems by carbon dioxide: part I, Portland cement", Cem Concr Res, 2(5), pp.567~576 (1972)